Fluid-injecting attachment for furnaces.



W. N. BEST. FLU `ID INJECTING ATTACHMENT FOR EURNACES APPLICATIONYFILEDMAH. 16. ISIS- 1,206,292.

Patend N ov. 28, 1916.

W. N. BESTlv FLUID I'NJECTING ATTACHMENT Fo'R FURNACES.

APPLICATION FILED MAR. l5. l-9l6.

Patented Nov. 28, 1916.

2 SHEETS-SHEET 2.

lllIll'al'lIAlVlv N. BEST, OF NEW YORK, N. Y.

FLUID-INJECTING ATTACHMENT FOR FURNACES.

Specification of Letters Patent.

Application filed March 16. 1916. Serial No. 84,545.

To all 'L ohom t may concern Be it known that I, WILLIAM N. BEST, acitizen of the United States, and resident of New York city, borough ofBrooklyn, in 5f. the county of Kings and State of New York,

have invented certain new and useful lmprovements in Fluid-InjectingAttachments for Furnaces, of which the following is a specification.

This invention relates to certain improvements in furnaces and moreparticularly to certain improvements adapted for use in connection withfurnaces burning coke, coal or other solid fuel.

My invention involves improved means for injecting and admitting fluidto the coinbustion chamber above the fire bed.

The device may be utilized for injecting liquid fuel and combustionsupporting air so asA to greatly increase the temperature in thefurnace, and adapted to carry a big load,

or it maybe used for admitting air to facilitate the combustion rof thegases and carbonaceous particles rising from the iire bed, and thesecuring of the maximum combustion actionv and the elimination of allsmoke. `It may be brought into -or out of use at will and thus whenburning oil, may take care of fiuctuating loads and increase very majasterially the efficiency of the boiler, or when used for consumingsmoke,it may be brought i'ito operation only when fresh fuel has beenadded to the fire.

I do not wish to restrict the use of my device to furnaces burningcarbonaceous or other solid fuel as it may be used in forging furnacesor in various other ways where a iquick heat is desired by the use ofliquid fuel.

Reference is to be had to the accompany-- irig drawing illustrating oneembodiment of my invention and in which similar reference charactersindicate corresponding parts in vthe several views.

L In these drawings: Figure l is an outside faceyiew of a deviceconstructed in accordance with my invention; Fig. 2 is a centralvertical section substantially on the line 2 2; Fig. 3 is a transversesection on the line 33 of Fig. 2; Fig. l is a front view of a furnace, aportion thereof being broken away and showing two of my improvedconstructions employed in connection therewith, y

and Fig. is a side view of a furnace, a portion thereof being brokenaway.

In the specific construction illustrated in Figs. 1, Q-and 3, I haveshown a furnace wall l() of any suitable non-combustible heat receivingmaterial and provided with an opening l1 therethrough. This opening` mayhave substantially parallel top and bottom.

walls, but its side walls preferably flare inwardly as shown in F ig. 2lso that the inner end of the opening is of materially greater width thantbc outer end. Rigidly secured to the furnace wall at the opening is acast iron box in the form of a collar or sleeve 12 projecting into theopening and held in place by the inwardly flaring` sides of the colla asshown in Fig. 3 and by a plate or flange 11'5- bolted along the upperedge as shown particularly in Fig. 2. The lower edge of this plate 13has an aperture or notch through which the burner or injector maydeliver.

The collar has two side auges 14, 14, which extenk'l downwardly andoutwardly and are provided with oppositcly facing grooves 15 withinwhich a closure plate 1G may slide. The edges of the plate may betapered so as to fit within the grooves as shown in Fig. 3, while theupper edge of the plate may be curved so as to fit within a concaverecess in the lower edge of a depending flange 17 integral with theupper side of thel collar or sleeve. The plate 16 closes the notch oraperture in the plate l?) when in raised position, but when lowered,substantially the whole opening comes below theburner instead of above,or at the sides.

Rigidly secured to the outer surface of the furnace wall at a pointbel'ow the opening 11 is a bracket 1S to which is pivoted a lever' arm19. Rigid with the bracket is a curved ,segmentbar 20 and the lever'carries a spring pressed dog 21 which may engage with the teeth of thesegment to hold the lever arm l19 in any desired position. A link 22ispivotally connected to the lever arm 19 and to lugs on the outersurface ofthe closure plate 16 so that the plate may be Inovedfto orfrom the closing position and rigidly held in either limiting orintermediate position.

Patented Nov. 28, 1916.

Supported just outside of the outer sur-L may be constructedsubstantially as shown in my prior Patent No. 752,195, issued February16, 04. The burner has a. supply conduit 24 for delivering oil, tar, orother liquid c. semi-liquid fuel and a supply conduit 25 for deliveringan expansible fluid such as air or steam. The sup )ly to the burnerma beregulated by suitable Avalves 26 and 2 in the supply conduits.

lVhen the device is used to help carry a )eak load or to take care of atemporary, but very high load, the closure plate 16 is lowered and theoil and expansible fluid are delivered to the burner. The `oil isvaorized and delivered in a substantially fan-s aped sheet above the bedof the fire. It-will be noted that the burner is located closelyadjacent to the upper surface of the opening so that air may enterbeneath the fan-shaped sheetof fuel vapor and properlv support thecombustion of this fuel. rIhe closure plate 16 need be open to only avery sli ht extent to permit the injecting of this uel, and the amountof air which acts to support the combustion may be regulated by raisingor loweringthe plate to the desired extent.

Vl en the device is 'employed to consume the smoke and gases resultingfrom incomplete combustion of the solid fuel, either the oil regulatingcock 27 or the cut-0H valve maybe shut and only steam or comp airdeliveredthrough the burner. This will enter the combustion chamber in asubstantially Vfan-sha d sheet and a considerable quantit f' of a1r willbe drawn in from the atmosp ere and beneath the burner by the injecting'action ofthe ex ansive fluid. This will mingle with the smo e particlesand the unconsumed gases and cause the combustion of both, thusincreasing the efficiency of the furnace as well as saving fuel by theconsum tion o f otherwise wasted fuels. The mec anical construction ofthe cast iron box lor sleeve and its attachments is such that the-maximum quantity of air may pass below the fan-shaped blanket ofexpansive fluid.

As previously stated, I do not wish to be limited to any particular typeof furnace or particular location for my improved device.

-In Fig. 4 I have shown a, furnace having a front Iwall 30, end walls 81and a grate 32. I have shown one of the end walls as being provided withan inlet passage 11 and the cast yiron box, closure and burner construc-'tion as shown in Figs.k 1, 2 and 3, and have also shown the front wallas provided with .l a similar opening and fluid injecting devices.

It' willbe noted that these inlets are. disposedia sufficient distanceabove 'thevgrate `to come above,y the fire-bed. The paryrl location 'andarrangement maybe va without departing-'from the spirit of Ventron.

thus described my invention, what I claim as new and desire to secure byLetters Patent is:

1. A furnace having an air inlet passage through the wall thereof andfrom the atmosphere to the fire box, the side walls of said passageflaring inwardly, a flange depending from the up r side of said passageat the outer end of t e latter and having a recess in its lower edge, avaporizer disKosed adjacent the outer surface of said' ange and oppositesaid recess and adapted to deliver a liquid fuel through said passage inasubstantially fan-shaped sheet spaced above the lower side of saidpassage, anda closure slidable upwardly to vary the air inlet spacebelow said vaporizer and adapted to engage with said flange and closesaid recess said vaporizer and into engagement with' said flange to clesaid passage.

3.. A furnace having an air inlet tpoasaage 'through the wall thereof, acast iron x dis- 2.. A furnace having an air inlet paage posed withinsaid passage and having its y. outer surface inclined at an angle tothey plane of the wall and including two opposed guides, a closure plateslidable between said guides, a lever ivoted to the wall below saidpassage, a lin connecting said lever and said closure plate, and meansfor locking said lever in position with said closure plate open to anydesired extent.

4. A furnace-having anair inlet pesage lthrough the wall thereof, a castiron box disposed within said passage and having its outer surfaceinclined at an angle to the plane of the wall and including two opposedguides, a closure plate slidable between said guides,'a lever Eivoted tothe wall below said4 passage, a 1in connecting said lever and saidclosure plate, means for locking said lever in positlon with saidclosure plate o to any desired extent, and in for de 'vering asubstantially fan-sha pansible fluid through said pesage in a linespaced a considera le distance above the lower wall of said p v 5: lAfurnace having anair-inlet p through the wall thereof, the opposite sidewalls of said passa converging at their outlelr endhls, athmetal. nd was wit n e pesage im to r8- vent outward movement of nid box,`a p

engagm `with the loutersufaoe of the nace wal to prevent inward movementof xhavingconvergmg jet of existY the box.y said box having a pair ofdownwardly and outwardly extending spaced guides, a closure plateslidable between said guides to close said passage, and means adjacentthe outer surface ot' said closure plate and adapted to deliver anexp'anshle fluid l inwardly through Said passage when said elosure isopen.

Signed at Ne New York and day of March.

w York eity in the county of State of New York this lith 10 l). 1916.

VILLIAM N. BEST.

